Lobe knob



FIG. 1 is a front view of a lobe knob, showing my new design.

FIG. 2 is a rear view thereof.

FIG. 3 is a top view thereof.

FIG. 4 is a bottom view thereof.

FIG. 5 is a first right side view thereof.

FIG. 6 is a second right side view thereof.

FIG. 7 is a third right side view thereof; and,

FIG. 8 is a left side view.

The broken line boundary shown on the top surface of the lobe knob forms no part of the claimed design. 

The ornamental design for a lobe knob, as shown and described. 